JP6143588B2 - Laminated sliding member and sliding bearing using this laminated sliding member - Google Patents

Description

  The present invention relates to a laminated sliding member and a sliding bearing using the laminated sliding member.

  Conventionally, in order to obtain a laminated sliding member containing a solid lubricant, a cotton cloth base material is dipped in a phenol resin varnish in which a solid lubricant such as graphite, molybdenum disulfide, or a powder of ethylene tetrafluoride resin is dispersed and pulled up. Methods such as heating to dissipate the solvent to obtain a prepreg in which these solid lubricants are adhered and impregnated on a cotton fabric base material and laminate molding are used.

Japanese Examined Patent Publication No. 39-14852 JP-A-11-182095

  By the way, if the mixing ratio of the solid lubricant is kept relatively low in order to maintain the workability when forming the prepreg by dipping and pulling up the cotton fabric base material, the friction coefficient cannot be lowered and sufficient wear resistance can be obtained. I can't get it.

  In addition, even if the mixing ratio of the solid lubricant can be increased, the mixture of the phenol resin and the solid lubricant is not sufficiently filled in the fiber structure gap of the cotton base material by simple dipping. When it is laminated and formed using such a prepreg, there is a possibility that the resulting laminated sliding member may cause delamination. As a result, the mechanical strength of the laminated sliding member is significantly reduced. There is a risk.

  In order to solve such a problem, Patent Document 1 discloses that a reinforcing base material is impregnated with a synthetic resin varnish in advance, and then a varnish containing a solid lubricant is applied to the varnish-impregnated reinforcing base material, or water of a solid lubricant is used. Although a method is disclosed in which a solid lubricant is attached only to substantially the surface of the reinforcing substrate by applying a dispersion or the like, the method disclosed herein also provides low friction and resistance to the laminated sliding member. Abrasion and the like are not always sufficient.

  Especially in recent years, such a laminated sliding member is installed in combination with an elastic bearing device that supports buildings such as buildings, bridges or elevated roads in the field of architecture and civil engineering, or installed as a sliding bearing, In the case of a slip isolation device that reduces the seismic force applied to buildings such as buildings, bridges, and elevated roads, there is a problem that it is difficult to withstand use from the viewpoint of low friction and wear resistance.

  Moreover, as such a sliding member is applied to a sliding seismic isolation device, there is a seismic isolation device formed by impregnating a woven fabric of polyethylene terephthalate with a resin composition obtained by adding tetrafluoroethylene resin to an unsaturated polyester resin. This is proposed in Patent Document 2.

  Such a sliding member can be applied to a slip isolation device that could not be achieved with a conventional slip member. For example, when the friction coefficient is about 0.1, the sliding member proposed in Patent Document 2 does not slip unless the seismic force is 0.1 G (gal) or more. However, it is not always satisfactory, and there is a possibility that the function of the seismic isolation device may be disturbed.

  In order to reduce the friction coefficient at the start of sliding, it is conceivable to adopt a means such as forming a lubricant film such as a solid lubricant on the sliding surface of the seismic isolation device. When subjected to a high-speed sliding of sec, the sliding surface reaches a temperature of 100 ° C., and the lubricating coating melts and flows out from the sliding surface, and there is a concern that the sliding performance is greatly deteriorated.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to have a low friction property, and even when subjected to high-speed sliding during an earthquake, a solid lubricant due to an increase in sliding frictional heat The laminated sliding member that can prevent the outflow of the layer and does not cause the solid lubricant layer to be lost or deformed on the sliding surface even when the load is concentrated on the sliding surface, and the laminated sliding member are used. It is to provide a sliding bearing.

  The laminated sliding member of the present invention comprises a substrate having a plurality of recesses on one flat surface, and a solid lubricant layer that extends to the recesses of the substrate and is deposited on at least one flat surface of the substrate. The base body comprises a laminate comprising a plurality of polyester fiber woven fabrics impregnated with a resol-type phenol resin containing a tetrafluoroethylene resin and being joined to each other and having the one flat surface; The plurality of recesses are surrounded by an outer peripheral edge of one flat surface of the laminate and a predetermined distance inward from the outer peripheral edge and a virtual line similar to the outer peripheral edge. Of the one flat surface of the laminate that is other than the annular outer flat surface of the one flat surface of the laminated body that is positioned inward with respect to the annular outer flat surface and surrounded by the virtual line Open in the inner flat surface of the laminate Each of the plurality of recesses is defined by the cylindrical wall surface of the laminate and the circular bottom wall surface of the laminate, and one flat surface of the laminate comprising the inner flat surface and the annular outer flat surface, the cylindrical wall surface And the circular bottom wall surface is provided with a fluff of polyester fiber woven fabric, and the solid lubricant layer is integrated with the fluff and extends to the concave portion of the laminate, and at least one of the laminate It is attached to the flat surface.

  According to the laminated sliding member of the present invention, the solid lubricant layer is mixed and integrated with the fluff of the polyester fiber woven fabric on one flat surface, the cylindrical wall surface, and the circular bottom wall surface of the laminated body. Since it is attached to one flat surface, even if the solid lubricant layer melts due to an increase in frictional frictional heat, it can be prevented from flowing out, and each of the plurality of recesses is formed on the annular outer side of the laminate. Since the opening is made on the inner flat surface other than the flat surface, even if the load is concentrated on the annular outer flat surface, defects such as cracks and chips on the annular outer flat surface in the vicinity of the outer peripheral edge and deformation are caused. There is nothing.

  In the present invention, the substrate further includes another laminate in which a plurality of inorganic fiber woven fabrics or organic fiber woven fabrics are stacked and joined to each other while being integrally joined to the other surface of the laminate. If the other laminated body is further provided, the other laminated body can function as a backing metal, and the mechanical strength of the base can be further increased. It is possible to further eliminate defects such as cracks and chipping and deformation.

  In a preferred example of the laminated sliding member of the present invention, an orthogonal direction perpendicular to the outer peripheral edge from the outer peripheral edge of one flat surface of the base to the virtual line (when one flat surface is circular in plan view, its diameter The given distance of the direction (hereinafter the same) is 0.5 to 1.1 times the opening diameter of the recess.

  Such a distance is 0.5 to 1.1 times the opening diameter of the recess, so that one of the flat surfaces of the base between the outer peripheral edge of the one flat surface of the base and the virtual line It has been confirmed by experiments that defects such as cracks and chips caused by stress concentration on the annular outer flat surface and defects such as deformation can be more effectively avoided.

  When the given distance is less than 0.5 times the opening diameter of the recess, the width in the orthogonal direction perpendicular to the outer peripheral edge of the annular outer flat surface is narrowed, and a load acts on the annular outer flat surface having a narrow width. In addition, there is a possibility that the outer peripheral edge of one flat surface of the base body may easily be broken or chipped, and if such a distance exceeds 1.1 times the opening diameter of the recess, the annular outer flat surface is covered. The anchor effect on the solid lubricant layer is insufficient, and the solid lubricant layer deposited on one flat surface may be washed away.

  In the laminated sliding member of the present invention, the plurality of recesses are equidistant from the center of one flat surface of the laminated body and outward from the center, and a plurality of virtual concentric rings similar in shape to the outer peripheral edge. It is preferable that each of the lines is centered on the line, and in such a case, the virtual line is an envelope with respect to the cylindrical wall surface defining a plurality of recesses each centered on the outermost concentric line. Good.

  Such a plurality of recesses exerts an anchor effect on the solid lubricant layer in the sliding direction, so that the outflow due to the increase in sliding frictional heat of the solid lubricant layer covering one flat surface is prevented as much as possible. Can do.

  In the laminated sliding member of the present invention, the interval between two orthogonal recesses adjacent to each other in the orthogonal direction orthogonal to the outer peripheral edge of one flat surface, the orthogonal direction orthogonal to the outer peripheral edge between adjacent concentric lines in a plurality of concentric lines Each distance (width between adjacent concentricity) is preferably 1.5 to 1.8 times the opening diameter of the recess.

  If each such distance between adjacent concentric wires is less than 1.5 times the opening diameter of the recess, the number of recesses disposed on one flat surface will increase, causing a reduction in the strength of the laminated sliding member. If the distance exceeds 1.8 times the opening diameter of the recess, the anchor effect by the recess of the solid lubricant layer is not sufficient, and the solid lubricant layer may be lost.

  In the laminated sliding member of the present invention, one flat surface has a circular shape in a plan view, and the plurality of virtual concentric annular lines are composed of a plurality of virtual concentric circles, and one of the plurality of virtual concentric circles. On the nth (n is a positive integer) virtual concentric circle from the center of the flat surface, 6 × n concave portions are arranged with the same central angle between adjacent concave portions with respect to the nth virtual concentric circle. Yes.

  When one flat surface of the substrate has a circular shape in plan view and a plurality of virtual concentric annular lines are formed from a plurality of virtual circles, if the recess is arranged in this way, the center of the one flat surface Since there are recesses in the radial direction from the outer side of the solid lubricant layer, the anchor effect for all slip directions due to the recesses with respect to the solid lubricant layer is exerted, and the flow from one side of the solid lubricant layer is lost. Can be prevented as much as possible.

  In the present invention, one flat surface of the base body has a circular shape in plan view as described above, and a plurality of virtual concentric annular lines may be formed of concentric circles. , A rectangular shape in plan view, or a planar regular polygon shape including a square in plan view or a circular shape in planar view, and when one flat surface of the substrate is a rectangular shape in planar view or a regular polygon in plan view, The center of the one flat surface is the figure centroid of these shapes (plane figure centroid), the orthogonal direction orthogonal to the outer peripheral edge is the direction orthogonal to each side, and the virtual line is a rectangle or regular many A plurality of imaginary concentric annular lines consisting of rectangular or regular polygonal lines similar to a square, and having a center of gravity at the same position, but a plurality of rectangles or regular polygons having different distances from the center of gravity in the orthogonal direction The one flat surface of the base is In the case of a circular shape in plan view, the center of the one flat surface is the center of the circle, the orthogonal direction orthogonal to the outer peripheral edge is the radial direction of the circle, and the virtual line is a circle. The outer flat surface is an annulus and the inner flat surface is a circle.

  In the laminated sliding member of the present invention, in a preferred example, the laminated body contains 40 to 60% by mass of a resol type phenol resin, 10 to 30% by mass of a tetrafluoroethylene resin, and 25 to 35% by weight of a polyester fiber woven fabric. It is out.

  In the laminated sliding member of the present invention, the solid lubricant layer may contain a hydrocarbon wax, a tetrafluoroethylene resin, a melamine cyanurate, and a phosphate. In this case, in a preferred example, the hydrocarbon wax 20-40 mass%, tetrafluoroethylene resin 20-50 mass%, melamine cyanurate 15-30 mass%, and phosphate 5-15 mass% are contained.

  In the laminated sliding member of the present invention, the base may have the other flat surface, or alternatively, the other surface having a convex spherical shape, and the other surface may be Although it may be a circular shape in plan view, it may be a regular polygon in plan view including a rectangular shape in plan view or a square shape in plan view, like the one flat surface of the substrate.

  The sliding bearing according to the present invention is a rubber elastic having a lower ridge having a recess opening on one flat surface, and an annular notch step portion on the outer periphery of the upper surface, which is densely housed in the recess of the lower heel. A body, an annular ring fitted and fixed to the notch step, an intermediate plate disposed on the upper surface of the rubber elastic body so as to be swingable and rotatable with respect to the lower collar, and having a recess on the upper surface; The above-mentioned laminated sliding member fitted and fixed to the concave portion of the intermediate plate, and an upper collar to which a sliding plate that slidably contacts the solid lubricant layer of the laminated sliding member is fixed. The concave portion of the lower collar, the rubber elastic body, and the intermediate plate have a shape in a plan view regular polygon including a plan view circular shape, a plan view rectangle, or a plan view square corresponding to the plan view circular shape of the laminated sliding member. In a preferred example, it is circular in plan view. In the sliding bearing of the present invention, the annular ring is a synthetic resin protective ring inserted into the annular notch step portion of the rubber elastic body, and is disposed on the upper surface of the protective ring and rubber. And a metal compression ring inserted into the annular notch step portion of the elastic body, and yet another sliding bearing of the present invention has a concave spherical surface on one surface. A slidable contact with the above-mentioned laminated sliding member arranged on the lower ridge so that the other surface of the convex spherical surface is in contact with the concave sphere of this lower heel, and the solid lubricant layer of this laminated sliding member And an upper arm to which a sliding plate is fixed.

  According to the present invention, it has a low friction property, and even when subjected to high-speed sliding during an earthquake, it is possible to prevent the solid lubricant layer from flowing out from one flat surface due to an increase in sliding frictional heat. It is possible to provide a laminated sliding member that does not cause defects such as cracks and chips on the sliding surface even when a load is concentrated on the moving surface, and a sliding bearing using the laminated sliding member. .

FIG. 1 is an explanatory plan view of an example of an embodiment of the present invention. FIG. 2 is an explanatory cross-sectional view of the example shown in FIG. FIG. 3 is a partially enlarged cross-sectional explanatory view of FIG. FIG. 4 is an explanatory diagram of an example of the manufacturing process of the example shown in FIG. FIGS. 5A and 5B are perspective explanatory views of a prepreg forming the laminated body of the example shown in FIG. FIG. 6 is a cross-sectional explanatory view of an example of a method for manufacturing the laminated body of the example shown in FIG. 1 using the prepreg shown in FIG. FIG. 7 is a perspective explanatory view of a laminate in the example shown in FIG. FIG. 8 is a partially enlarged cross-sectional explanatory view of the laminate in the example shown in FIG. FIG. 9 is an explanatory diagram of an example of the manufacturing method in another example of the embodiment of the present invention. FIG. 10 is an explanatory cross-sectional view of an example of the manufacturing method of another example shown in FIG. FIG. 11 is a partially enlarged cross-sectional explanatory view of the example shown in FIG. 12 (a) and 12 (b) are photographic explanatory views of the form of the sliding surface after the friction performance test of Example 1 of the present invention, where (a) is a plan photographic explanatory view, and (b) FIG. FIGS. 13A and 13B are photographic explanatory views of the form of the sliding surface after the friction performance test of Example 2 of the present invention, where FIG. FIG. 14 (a) and 14 (b) are photographic explanatory views of the form of the sliding surface after the friction performance test of the comparative example, wherein (a) is a plan photographic explanatory diagram and (b) is a side photographic description. FIG. FIG. 15 is a cross-sectional explanatory view of a preferred example of the sliding bearing according to the present invention. FIG. 16 is a partially enlarged cross-sectional explanatory view of the example shown in FIG. FIG. 17 is a longitudinal cross-sectional explanatory view of another preferred example of the sliding bearing according to the present invention. FIG. 18 is an explanatory plan view of a comparative example.

  Next, the present invention and its embodiments will be described in more detail based on preferred embodiments shown in the drawings. In addition, this invention is not limited to these Examples at all.

  1 to 3, a laminated sliding member 1 includes a base 4 having one flat surface 3 that is circular in plan view, and a sliding surface that is attached to the flat surface 3 of the base 4 and is circular in plan view. 2 and a solid lubricant layer 5 having 2.

  A substrate 4 comprising a laminate 6 having a flat surface 3 and a plurality of polyester fiber woven fabrics impregnated with a resol type phenolic resin containing a tetrafluoroethylene resin and being joined to each other, The flat surface 3 of the flat surface 3 is located at a desired distance W inward in the radial direction from the outer peripheral edge 7 and surrounded by a circle 9 as an imaginary line similar to the outer peripheral edge 7. It is an inner flat surface of the flat surface 3 other than the annular flat surface 8 which is an annular outer flat surface of the flat surface 3 which is located radially inward with respect to the annular flat surface 8 and surrounded by the circle 9. Opened at the circular flat surface 3 a and arranged in the laminate 6, and has a circular opening surface 10 in plan view on the circular flat surface 3 a, a cylindrical wall surface 11 of the laminate 6, and a circular bottom wall surface 12 of the laminate 6. It has a plurality of defined recesses 13 and is circular The flat surface 3 including the surface 3 a and the annular flat surface 8, the cylindrical wall surface 11, and the circular bottom wall surface 12 are provided with fuzzy fuzz 16 of a polyester fiber woven fabric, and the solid lubricant layer 5 is mixed with the fuzzy 16. The laminated body 6 extends to the recess 13 and is attached to the flat surface 3 including the circular flat surface 3 a and the annular flat surface 8 of the laminated body 6.

  The distance (radial width) W is 0.5 to 1.1 times the diameter d of the opening surface 10 of the recess 13, and the plurality of recesses 13 are circular planes of the flat surface 3 of the laminate 6. A center O1, which is a center O1 of the figure, and a plurality of concentric circles P1, P2 and P3, which are a plurality of virtual concentric circular lines having an equal interval T from the center O to the outside in the radial direction, respectively. In this example, 6 × n concave portions 13 are arranged on the n-th (n is a positive integer) virtual concentric circles P1, P2, and P3 from the center of the flat surface 3, which are arranged with O2 and O3. Then, on the concentric circles P1, P2 and P3, six, twelve and eighteen concave portions 13 respectively have the same central angle θ1 (= 60 °) between the adjacent concave portions 13 with respect to the concentric circles P1, P2 and P3. , Θ2 (= 30 °) and θ3 (= 20 °), and equidistant T The imaginary circle 9 is 1.5 to 1.8 times the diameter d of the opening surface 10, and the imaginary circle 9 is an envelope of the cylindrical wall surface 11 defining 18 recesses 13 arranged with a center O3 in the concentric circle P3. It has become.

  The resol type phenolic resin impregnated in the polyester fiber woven fabric, which is a reinforcing base material, is synthesized using phenols containing 50 to 100 mol% of bisphenol A and formaldehydes as amines as catalysts, and a gel of 500 to 1000 It has a number average molecular weight Mn measured by permeation chromatography (GPC) and a dispersity Mw / Mn which is a ratio of a weight average molecular weight Mw of 2.5 to 15 and a number average molecular weight Mn.

Resol type phenol resins, among phenols, the proportion of bisphenol _{A (C 15 H 16 O 2} ) and 50 to 100 mol%. This is the ratio of the number of moles of bisphenol A to the total number of moles of all phenols added at the start of synthesis.

  The resol type phenol resin after synthesis has a number average molecular weight Mn by GPC measurement of 500 to 1000 and a dispersion degree Mw / Mn of molecular weight distribution of 2.5 to 15. Affinity with the polyester fiber woven fabric as the base material is remarkably improved, and therefore, the polyester fiber woven fabric has good adhesion to the polyester fiber woven fabric without surface treatment. The laminate 6 formed using a fiber woven fabric has high rigidity and excellent mechanical strength, and also has extremely small swelling even when used in a humid atmosphere such as water.

  If the bisphenol A is less than 50 mol% in the resol type phenolic resin, sufficient affinity with the polyester fiber woven fabric cannot be obtained, and sufficient adhesion with the polyester fiber woven fabric cannot be obtained. Moreover, it is preferable that it is number average molecular weight Mn500-1000 by GPC measurement, and dispersion degree Mw / Mn is 2.5-15. When the number average molecular weight Mn is less than 500, the mechanical strength is lowered even if the affinity with the polyester fiber woven fabric is good, and when the number average molecular weight Mn exceeds 1000, the viscosity of the resol type phenol resin increases. It is too difficult to impregnate the polyester fiber woven fabric. Furthermore, when the degree of dispersion Mw / Mn is less than 2.5, sufficient adhesion to the polyester fiber woven fabric cannot be obtained, and when the degree of dispersion Mw / Mn exceeds 15, the number average molecular weight Mn exceeds 1000. Similarly, it is difficult to impregnate the polyester fiber woven fabric.

  When bisphenol A in phenols is less than 100 mol%, phenols other than bisphenol A are included. Examples of phenols other than bisphenol A include phenol, cresol, ethylphenol, aminophenol, resorcinol, xylenol, butylphenol, trimethylphenol, catechol, and phenylphenol. Among them, phenol is preferably used because of its characteristics. These phenols other than bisphenol A may be used alone, or two or more of them may be used as a mixture.

  Examples of formaldehydes include formalin, paraformaldehyde, salicylaldehyde, benzaldehyde, p-hydroxybenzaldehyde and the like. In particular, formalin and paraformaldehyde are preferably used because of their ease of synthesis. These formaldehydes may be used alone or in combination of two or more.

  Examples of amines used as the catalyst include triethylamine, triethanolamine, benzyldimethylamine, aqueous ammonia, and the like. Among them, triethylamine and aqueous ammonia are preferably used because of easy synthesis.

  40-60 mass% is suitable for content of the resol type phenol resin contained in the laminated body 6. FIG. When the content of the resol type phenol resin is less than 40% by mass, the moldability (production) to the laminated sliding member 1 is hindered, and when it exceeds 60% by mass, the mechanical strength of the laminate 6 is lowered.

  The tetrafluoroethylene resin (hereinafter abbreviated as “PTFE”) blended with the resol type phenol resin includes molding powder (hereinafter abbreviated as “high molecular weight PTFE”) for molding, and high molecular weight PTFE by radiation irradiation or the like. Any of PTFE having a lower molecular weight than that of (hereinafter abbreviated as “low molecular weight PTFE”) can be used. The molecular weight of high molecular weight PTFE is, for example, about 700,000 to 10 million or more, and the molecular weight of low molecular weight PTFE is, for example, about 10,000 to 500,000. Low molecular weight PTFE is mainly used as an additive material and is easy to grind and has good dispersibility.

  Specific examples of the high molecular weight PTFE include “Teflon (registered trademark) 7-J”, “Teflon (registered trademark) 7A-J”, “Teflon (registered trademark) 70-J” manufactured by Mitsui DuPont Fluorochemical Co., Ltd. “Polyflon M-12 (trade name)” manufactured by Daikin Industries, Ltd., “Fluon G163 (trade name)”, “Fluon G190 (trade name)” manufactured by Asahi Glass Co., Ltd., and the like.

  Specific examples of low molecular weight PTFE include “TLP-10F (trade name)” manufactured by Mitsui DuPont Fluoro Chemical Co., Ltd., “Lublon L-5 (trade name)” manufactured by Daikin Industries, Ltd., and “Fullon” manufactured by Asahi Glass Co., Ltd. “KTL-8N (trade name)”, “KTL-2N (trade name)” manufactured by Kitamura, etc., such as “L150J (trade name)” and “Full-on L169J (trade name)”.

  For the laminate 6, both high molecular weight PTFE and low molecular weight PTFE can be used, but when mixed with the resol type phenolic resin, in order to make it difficult to uniformly disperse and form voids, low molecular weight PTFE powder is preferred. Moreover, the average particle diameter of PTFE powder is 1-50 micrometers from a viewpoint of disperse | distributing uniformly and preventing the production | generation of a void, Preferably it is 1-30 micrometers.

  The content of PTFE contained in the laminate 6 is suitably 10 to 30% by mass. If the PTFE content is less than 10% by mass, the effect of improving the friction and wear characteristics cannot be obtained, and if it exceeds 30% by mass, the viscosity of the resin may increase during molding and voids may be generated. In addition, there is a possibility that the adhesiveness of the resol type phenolic resin is lowered, the strength of the laminated sliding member 1 is lowered, or delamination is caused.

  The polyester fiber woven fabric is a woven fabric obtained by spinning polyester fibers according to a conventional method. The polyester fiber is generally obtained by polycondensation of a dicarboxylic acid component and a diol component. Examples of the dicarboxylic acid component include terephthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, and the like. Examples of the diol component include ethylene glycol, hydroquinone, bisphenol A, and biphenyl. Moreover, p-hydroxybenzoic acid, 2-oxy-6-naphthoic acid, etc. are mentioned as what serves as both components. A typical polyester fiber is obtained from polyethylene terephthalate (PET) containing terephthalic acid and ethylene glycol as main components. General polyester fibers have low moisture absorption and water absorption, and a moisture content of 0.4 to 0.5%. In contrast, cotton is usually 8-9%.

  The form of spinning may be a filament yarn (filament yarn) obtained by twisting long fibers or a spun yarn (spun yarn) obtained by twisting short fibers. In addition, the woven fabric structure is not particularly limited, and includes plain weave, twill weave, satin weave mihara structure, change plain weave, change twill weave, change satin weave, etc., mixed structure of mihara texture and change tissue, etc. Can be used.

  The content of the polyester fiber woven fabric contained in the laminate 6 is preferably 25 to 35% by mass. When the content of the polyester fiber woven fabric is less than 25% by mass, the reinforcing effect when the laminated sliding member 1 is obtained is not sufficient, and when it exceeds 35% by mass, the moldability (manufacturing) of the laminated sliding member 1 is hindered. It will be.

  The resol type phenolic resin contained in the laminate 6 is 40 to 60% by mass, the tetrafluoroethylene resin is 10 to 30% by mass, and the polyester fiber woven fabric is 25 to 35% by mass. Good strength and frictional wear characteristics can be obtained.

  The prepreg (resin processing base material) of the laminated body 6 can be produced using, for example, a production apparatus as shown in FIG. That is, in the present manufacturing apparatus shown in FIG. 4, the reinforcing base material 18 made of a polyester fiber woven fabric wound around the uncoiler 17 is made of PTFE powder and resol type phenolic resin varnish in which PTFE powder is uniformly dispersed by a feed roller 19. The mixed liquid 20 is sent to the container 21, and is passed through the mixed liquid 20 stored in the container 21 by the guide rollers 22 and 23 provided in the container 21. The reinforced base material 18 coated with the mixed liquid 20 and fed with the mixed liquid 20 is sent to the compression rolls 24 and 25 by the feed roller 19, and applied to the surface of the reinforcing base material 18 by the compression rolls 24 and 25. The mixed liquid 20 thus impregnated is impregnated into the fiber structure gap, and the solvent is applied to the reinforcing substrate 18 on which the mixed liquid 20 is impregnated and coated in a drying furnace 26. The reaction of the simultaneously resol type phenolic resin varnish blown is advanced, thereby formable prepreg laminate 6 (resin processing substrate) 27 is prepared.

  In this production method, the solid content of the resol type phenolic resin varnish prepared by dissolving the resol type phenolic resin in a volatile solvent is about 30 to 65% by mass with respect to the entire resin varnish, and the viscosity of the resin varnish is About 800 to 5000 cP is preferable, and 1000 to 4000 cP is particularly preferable.

  As shown in FIG. 5 (a), such a prepreg 27 is cut into a square shape by the number of sheets to obtain a desired finished thickness, and then, as shown in FIG. After a predetermined number of cut prepregs 27 are stacked and laminated in a rectangular recess 29, the prepreg 27 is heated to a temperature of 140 to 160 ° C. in a mold 28, and ram is applied at a pressure of 4.9 to 7 MPa. 30 to produce a rectangular laminated molded article 31 in which the laminated prepregs 27 are joined and fused together as shown in FIG. The molded product 31 is machined to form a disk-shaped laminate 6 as shown in FIG. The disk-shaped laminate 6 formed in this way has high rigidity and excellent mechanical strength, and excellent friction and wear characteristics, and further swells even when used in a humid atmosphere such as oil or water. Since the amount is extremely small, it can be applied to a wide range of applications such as dry friction conditions, grease lubrication conditions, and water lubrication conditions. As shown in FIG. 5 (b), the disk-shaped laminate 6 is machined into a square prepreg 27 shown in FIG. 5 (a) to produce a disk-shaped prepreg 27a. 3. A predetermined number of disk-shaped prepregs 27a are stacked in a circular recess 29a of the mold 28 of the pressure device, and then heated to a temperature of 140 to 160 ° C. in the mold 28. A circular laminate 6 as shown in FIG. 7B may be formed by pressure molding in the laminating direction with a ram 30 at a pressure of 9 to 7 MPa.

  Next, as shown in FIG. 8, a recess 13 is formed on the surface 15 to be the flat surface 3 of the disk-shaped laminate 6 by machining with an end mill or a drilling machine, and the cylindrical wall 11 defining the recess 13 is formed. Further, a thin fluff 16 of polyester fiber woven fabric is formed on the surface that becomes the circular bottom wall surface 12, and the surface 15 that becomes the flat surface 3 is roughened by polishing or sandblasting, and the surface 15 is made of polyester. A thin fluff 16 of fiber woven fabric is formed.

  The solid lubricant layer 5 that is adhered to the flat surface 3 of the laminated body 6 so as to coexist with the fluff 16 and extend to the recess 13 is composed of hydrocarbon wax, melamine cyanurate, PTFE, and phosphate. Is included.

  The hydrocarbon wax mainly imparts low friction to the solid lubricant layer 5, and as the hydrocarbon wax, a paraffin wax having approximately 24 or more carbon atoms, an olefin wax having approximately 26 or more carbon atoms, The hydrocarbon wax is selected from at least one of alkylbenzene having a carbon number of approximately 28 or more and microcrystalline wax. Specifically, as the wax of wax, specifically, paraffin wax “150 (trade name)” manufactured by Nippon Seiwa Co., Ltd., Micro Crystalline wax “Hi-Mic-1080 (trade name)”, polyethylene wax “Licowax PE520 (trade name)” manufactured by Clariant Japan, and a mixture of polyethylene wax and paraffin wax made by Nikko Fine Products “Godes wax (trade name) ) "And the like. The blending ratio of the hydrocarbon wax is preferably 20 to 40% by mass. When the blending ratio is less than 20% by mass, the low friction property cannot be exhibited sufficiently, and when it exceeds 40% by mass, the bonding force between the solid lubricant layer 5 and the surface 15 is weakened.

  Melamine cyanurate is an addition compound of melamine and cyanuric acid or isocyanuric acid. A melamine molecule with a 6-membered ring structure and cyanuric acid (isocyanuric acid) molecules are arranged in a plane by hydrogen bonds, and the plane has a weak binding force. It is thought that it has a cleavage property like molybdenum disulfide or graphite. This melamine cyanurate plays a role of improving the wear resistance and load resistance of the solid lubricant layer 5 in particular. The melamine cyanurate is not particularly limited, and generally known melamine cyanurate can be used. For example, those described in JP-B-45-5595, JP-B-61-34430, JP-A-5-310716, JP-A-07-224049 and the like can be suitably used. Specifically, “MCA-1 (trade name) manufactured by Mitsubishi Chemical Corporation,“ MC600 ”,“ MC860 ”,“ MC4000 ”,“ MC6000 ”(all trade names) manufactured by Nissan Chemical Co., Ltd. and the like can be mentioned. . The blending ratio is preferably 15 to 30% by mass. If the blending ratio is less than 15% by mass, the desired effect of improving the wear resistance and load resistance cannot be obtained. If it exceeds 30% by mass, the wear resistance and load resistance are decreased.

  PTFE imparts low friction with the hydrocarbon wax, and as the PTFE, both high molecular weight PTFE and low molecular weight PTFE similar to those described above can be used. The blending ratio of PTFE is preferably 20 to 50% by mass. When the blending ratio is less than 20% by mass, low friction is not sufficiently imparted to the solid lubricant layer 5, and when it exceeds 50% by mass, it is exposed on the sliding surface 2 of the solid lubricant layer 5. The ratio to be increased increases the wear resistance of the solid lubricant layer 5, and the shape retention is deteriorated, so that the strength of the solid lubricant layer 5 is decreased.

  Phosphate does not exhibit lubricity by itself, but plays a role in promoting the film forming property of the lubricant film of the solid lubricant layer 5 on the surface of the counterpart material in sliding between the solid lubricant layer 5 and the counterpart material. . Examples of the phosphate include alkali metal or alkaline earth metal tertiary phosphate, secondary phosphate, pyrophosphate, phosphite, and metaphosphate. Specific examples include trilithium phosphate, dilithium hydrogen phosphate, lithium pyrophosphate, tricalcium phosphate, calcium monohydrogen phosphate, calcium pyrophosphate, lithium metaphosphate, magnesium metaphosphate, and calcium metaphosphate. The blending ratio of the phosphate is preferably 5 to 15% by mass. When the blending ratio is less than 5% by mass, the effect of promoting the film forming property of the lubricating film on the surface of the counterpart material is not sufficiently exhibited. When the mixing ratio exceeds 15% by mass, the lubricating film on the surface of the counterpart material is not achieved. The amount of transfer of the solid lubricant layer 5 becomes excessive, and the wear resistance of the solid lubricant layer 5 is decreased.

  A solid lubricant layer 5 comprising a lubricating composition containing 20 to 40% by weight of a hydrocarbon wax, 10 to 30% by weight of melamine cyanurate, 20 to 50% by weight of PTFE and 5 to 15% by weight of a phosphate is a Henschel mixer, a super A predetermined amount of each component described above is mixed by a mixer such as a mixer, a ball mill, or a tumbler, and the resulting mixture is molded to produce a disk-shaped molded product. This molded product is used as the flat surface 3 of the laminate 6. The solid lubricant layer 5 which is placed on and compressed with the laminated body 6 to fill the concave portion 13 and mixed with the fine fluff 16 of the polyester fiber woven fabric is mixed with the flat surface 3 of the laminated body 6. Thus, the laminated sliding member 1 is formed.

  Incidentally, as shown in FIG. 9, in addition to the laminate 6, a plurality of inorganic fiber woven fabrics or organic fiber woven fabrics are superposed together with the other circular surface 41 of the laminate 6. The laminated sliding member 1 having the base 4 provided with the other laminated bodies 32 bonded to each other may be used, and the laminated body 32 shown in FIG. 9 is manufactured by a manufacturing apparatus similar to the manufacturing apparatus shown in FIG. That is, the reinforcing base material 33 made of organic fiber or inorganic fiber woven fabric wound around the uncoiler 17 is sent to the container 21 storing the resol type phenolic resin varnish 34 by the feed roller 19, and the guide provided in the container 21. The resol-type phenol resin varnish 34 is applied to the surface of the reinforcing base material 33 by passing through the resol-type phenol resin varnish 34 stored in the container 21 by the rollers 22 and 23, and the resol-type phenol resin varnish 34. The reinforcing substrate 33 coated with is fed to the compression rolls 24 and 25 by the feed roller 19, and the resol-type phenol resin varnish 34 is impregnated into the fiber structure gap by the compression rolls 24 and 25, and the resol-type phenol Drying the reinforcing base material 33 impregnated with the resin varnish 34 The reaction of the resole phenolic resin varnish 34 at the same time the solvent is blown off is advanced in the 26, this prepreg 35 of formable laminate 32 is produced by.

  As the reinforcing fiber woven fabric used for the laminate 32, inorganic fiber woven fabric such as glass fiber woven fabric, carbon fiber woven fabric, or aramid resin fiber woven fabric (copolyparaphenylene 3,4'oxydiphenylene terephthalamide). A resin fiber woven fabric, for example, an organic fiber woven fabric such as “Technola (registered trademark)” manufactured by Teijin Techno Products Ltd. is used.

  As shown in FIG. 10, a desired number of prepregs 35 or 35a cut into a square shape or a circular shape by machining are overlapped in a square shape or a circular recess 29 of a mold 28 of a heating and pressing apparatus. After being laminated, the prepreg 27 or 27a for the laminate 6 is placed on the upper surface thereof, and these are heated to a temperature of 140 to 160 ° C. in the mold 28, and are applied by the ram 30 at a pressure of 4.9 to 7 MPa. A multi-layer molded product having a square shape in plan view or a circular shape in plan view is produced by pressure molding in the laminating direction, and the prepreg 27 or 27a for the laminated body 6 and the laminated body 32 as shown in FIG. The prepreg 35 or 35a is joined to each other to produce a multilayer molded member 36 that is fused to each other. The multilayer molded member 36 thus produced includes a laminate 32 as a backing metal made of an inorganic fiber woven fabric or an organic fiber woven fabric, and the laminate 6 integrally joined to one surface 37 of the laminate 32. It has.

  In the multilayer molded member 36 having such laminates 32 and 6, the concave portion 13 and the fluff 16 are formed on the flat surface 3 of the laminate 6 in the same manner as described above to form the base body 4. The agent layer 5 is formed, and the laminated sliding member 1 as shown in FIG. 9 is produced.

  In the above example, the other surface 41 of the stacked body 6 and the other surface 41a of the stacked body 32 are flat surfaces in a plan view. For example, a disk-shaped prepreg 27a having a different diameter is formed in the same manner as described above. The base 4 may be formed by stacking and pressing a predetermined number of layers and pressing the laminate 6 having the other surface 41b that is circular in plan view and has a convex spherical shape as shown in FIG.

Example 1
A spun yarn of cotton count 20 is used as warp and weft, the number of warp driven is 43 / inch, the number of weft driven is 42 / inch, and 30% by mass of polyester fiber woven fabric made of plain weave is used. A prepreg for a laminate comprising 23% by mass and the remaining resol type phenolic resin consisting of 47% by mass was used.

  This prepreg is cut into a square shape having a side length of 200 mm, and this is cut into a recess in the mold of the heating and pressing apparatus shown in FIG. 6 having a square shape recess having a side length of 200.5 mm. After the 18 sheets were stacked and laminated, they were heated in the mold in the laminating direction at a temperature of 160 ° C. for 10 minutes and pressure-molded at a pressure of 7 MPa to obtain a rectangular laminated molded product. The obtained laminated molded product was machined to produce a laminated body with a diameter of 200 mm and a thickness of 8 mm in a plan view circular shape.

  On one flat surface of the laminate, 8.5 mm inward in the radial direction from the outer periphery (1.06 times the diameter of the opening of the recess), 12.5 mm equidistantly in a virtual circle separated by a distance W A total of 169 recesses with a depth of 0.9 mm including 6 pieces, 12 pieces, 18 pieces, 24 pieces, 30 pieces, 36 pieces and 42 pieces and one center O are formed on each concentric circle by end milling. did. A thin fluff of polyester fiber woven fabric as a reinforcing substrate is formed on the inner wall surface of the cylinder and the circular bottom wall surface that define the recesses formed by this end milling, and then one flat surface of the laminate in which these recesses are formed Was subjected to polishing, and thin fluff of polyester fiber woven fabric was formed on the one flat surface. The virtual circle is an envelope of a cylindrical wall surface that defines 42 concave portions having a center on a concentric circle having the maximum diameter.

  As a hydrocarbon-based wax, a mixture of polyethylene wax and paraffin wax manufactured by Nikko Fine Products "Godes Wax (trade name)" 38% by mass, PTFE "KTL-2N (trade name)" 38% by mass A mixture was prepared by adding 17% by mass of “MCA-1 (trade name)” manufactured by Mitsubishi Chemical Corporation as melamine cyanurate and 7% by mass of calcium pyrophosphate as a phosphate salt into a Henschel mixer, and using this mixture. Thus, a disk-shaped sheet was produced.

  This disc-shaped sheet is formed on one flat surface of a laminated body having thin fluffs of polyester fiber woven fabric on a cylindrical inner wall surface and a circular bottom wall surface that define one flat surface and 169 recesses, respectively. A solid lubricant layer is formed on one flat surface of the laminated body by being placed on the surface, compression-molded and filled in the recesses, and mixed with the fine fuzz of the polyester fiber woven fabric to form a laminated sliding member. 1 was produced.

Example 2
In the same manner as in Example 1, a laminated body having a diameter of 200 mm and a thickness of 8 mm and having a circular shape in plan view was produced.

  In a virtual circle located on one flat surface of the circular laminate in plan view with a distance W of 4.5 mm (0.5 times the diameter of the opening of the recess) radially inward from the outer periphery. 6, 12, 18, 24, 30, 36, 42, and center on imaginary concentric circles that are 13.8 mm concentric at equal intervals and located at equal intervals of 13.8 mm A total of 169 recesses having a depth of 0.9 mm including one of these were formed by end milling in the same manner as in Example 1. Thereafter, a solid lubricant layer was formed on one flat surface of the laminate having a total of 169 recesses in the same manner as in Example 1 to produce a laminated sliding member 1.

Comparative Example In the same manner as in Example 1, a laminate having a circular shape in plan view having a diameter of 200 mm and a thickness of 8 mm was produced.

  On one flat surface of such a laminate, 14.0 mm in an imaginary circle separated by a distance W of 2.5 mm (0.31 times the diameter of the opening of the recess) radially inward from the outer periphery. A total of 169 recesses having a depth of 0.9 mm including 6, 12, 18, 24, 30, 36, and 42, and one of the centers O, on each of the equally spaced concentric circles. It was formed in the same manner as in Example 1 by end milling. Thereafter, a solid lubricant layer was formed on one flat surface of the laminate having a total of 169 recesses in the same manner as in Example 1, and the laminated sliding member 1 shown in FIG. 18 was produced.

  Next, the friction performance of the laminated sliding member made up of Example 1 and Example 2 and the comparative example was tested under the test conditions shown below.

<Test conditions>
Surface pressure 20MPa, 40MPa, 60MPa
Excitation speed 1 cm / sec, 5 cm / sec, 10 cm / sec, 20 cm / sec, 30 cm / sec, 60 cm / sec
Mating material Stainless steel plate (SUS316)
Test method The solid lubricant layer of the laminated sliding member is slidably brought into contact with the surface of the counterpart material fixed on the table of the biaxial testing machine, and the surface pressure of the laminated sliding member is 20 MPa, 40 MPa, and 60 MPa. A load was applied to the mating member, and the counterpart material side was vibrated 11 times (11 cycles) with a sine wave having an amplitude of ± 200 mm.

  The test results are shown in Tables 1 to 4.

  From the above test results, there was no significant difference in friction performance between the laminated sliding members of Example 1 and Example 2 and the comparative example, but the sliding surface of the laminated sliding member after the test A large difference in morphology was observed. 12 (a) and 12 (b) showing the form of the sliding surface after the test of the laminated sliding member of Example 1, and the figure showing the form of the sliding surface after the test of the laminated sliding member of Example 2 13 (a) and 13 (b) and the sliding surface of the comparative example, the sliding surface of the comparative example is shown in FIG. Since the width (distance W) of the annular flat surface of the moving surface is as small as 0.31 times the opening diameter of the recess, the solid lubricant layer on the outer periphery flows to the outside of the sliding surface, and cracks or chips on the outer periphery Defects, deformations, etc. are seen.

  In the laminated sliding members of Examples 1 and 2, the annular flat surface has a width (distance W) that is 0.5 to 1.06 times the opening diameter of the recess, so that high-speed sliding during an earthquake, for example, Even when subjected to high-speed sliding at 60 cm / sec, excellent friction performance is exhibited, and defects such as cracks and chipping and deformation do not occur on the sliding surface.

  As shown in FIGS. 15 and 16, the sliding bearing 39 incorporating the above-described laminated sliding member 1 includes a lower collar 52 having a circular recess 51 in a plan view that opens on one surface 40, and a lower collar 52. A rubber elastic body 54 having a circular shape in a plan view and having an annular notch step portion 53 on the outer peripheral edge of the upper surface, and an annular ring 55 fitted and fixed to the notch step portion 53. And an intermediate plate 58 having a circular shape in plan view provided on the upper surface of the rubber elastic body 54 so as to be swingable and rotatable with respect to the lower collar 52 and having a circular recess 57 on the upper surface 56. A laminated sliding member 1 fitted in and fixed to the concave portion 57, and an upper collar 60 to which a sliding plate 59 slidably contacting the sliding surface 2 of the solid lubricant layer 5 of the laminated sliding member 1 is fixed. ing.

  The annular ring 55 is fitted on and fitted into the notch step portion 53 of the rubber elastic body 54, and is disposed on the upper surface of the protective ring 62 and the annular shape of the rubber elastic body 54. The metal compression ring 63 is inserted into and fitted into the notch step portion 53, and from the gap 64 between the outer peripheral surface of the intermediate plate 58 and the wall surface of the recess 51 of the lower collar 52. By preventing the outer peripheral edge of the rubber elastic body 54 from protruding, the rubber elastic body 54 is prevented from being damaged.

  A sliding bearing 71 according to another embodiment shown in FIG. 17 includes a lower collar 74 having a concave spherical surface 73 on one surface 72, a sliding surface 2 of the solid lubricant layer 5, and a convex spherical surface 41b. On the other hand, it comprises a laminated sliding member 1 that is slidably in contact with the concave spherical surface 73 at the surface 41b, and an upper collar 60 to which a sliding plate 59 that is slidably in contact with the sliding surface 2 of the laminated sliding member 1 is fixed. ing.

  In the sliding bearings 39 and 71 shown in FIGS. 15, 16 and 17, a plurality of anchor bolts 81 which are embedded and fixed in the lower structure such as a bridge pier are fixed to the lower surfaces of the lower rods 52 and 74. In addition, a plurality of anchor bolts 82 embedded and fixed in an upper structure such as a bridge girder are also fixed to the upper rod 60.

  In the sliding bearings 39 and 71, since the laminated sliding member 1 is used, excellent friction performance is exhibited even when subjected to high-speed sliding of, for example, 60 cm / sec during an earthquake.

DESCRIPTION OF SYMBOLS 1 Laminated slide member 2 Sliding surface 3, 3a Flat surface 4 Base body 5 Solid lubricant layer 6, 32 Laminated body 7 Outer peripheral edge 8 Toroidal flat surface 13 Concave portion 16 Fluff 39, 71 Sliding bearing

Claims (16)

A substrate having a plurality of recesses on one flat surface, and a solid lubricant layer extending to the recesses of the substrate and deposited on at least one flat surface of the substrate. A plurality of polyester fiber woven fabrics impregnated with a resol-type phenol resin containing a fluoroethylene resin are stacked and joined together, and a laminate having the one flat surface is provided. Is one flat surface of the laminate, which is located at a given distance inward from the outer periphery of the one flat surface of the laminate and surrounded by a similar virtual line on the outer periphery. Other than the annular outer flat surface of the surface, and is located inward of the annular outer flat surface and is opened at the inner flat surface of one flat surface of the laminate surrounded by the virtual line. are arranged in the laminate, a plurality pieces of recesses Each is defined by the cylindrical wall surface of the laminate and the circular bottom wall surface of the laminate. One flat surface of the laminate composed of the inner flat surface and the annular outer flat surface, the cylindrical wall surface and the circular bottom wall surface are polyester fibers. It is provided with a fluff of woven fabric, and the solid lubricant layer is mixed and integrated with the fluff and extends to the concave portion of the laminate, and is applied to at least one flat surface of the laminate. cage, given the distance from the outer peripheral edge of the one flat surface of the base body to the imaginary line, the laminated sliding member Ru 1.1 Baidea 0.5 times the opening diameter of the recess.   2. The substrate according to claim 1, further comprising another laminated body integrally bonded to the other surface of the laminated body and bonded to each other by overlapping a plurality of inorganic fiber woven fabrics or organic fiber woven fabrics. The laminated sliding member as described. The plurality of recesses are equally spaced from each other toward the center of one flat surface of the laminate and outward from the center, and are arranged with a center on a plurality of virtual concentric annular lines similar to the outer periphery. The laminated sliding member according to claim 1 or 2. One flat surface of the base has a circular shape in plan view, and the plurality of virtual concentric circular lines are formed of a plurality of virtual concentric circles, and the nth from the center of one flat surface of the plurality of virtual concentric circles. 4. The virtual concentric circle of (n is a positive integer) has 6 × n concave portions arranged at equal central angles between adjacent concave portions with respect to the n-th virtual concentric circle. Laminated sliding member. One flat surface is circular when viewed from above, the imaginary line is a circle, the outer flat surface is annular, and the inner flat surface is circular. The laminated sliding member according to item. The laminate includes 40 to 60% by mass of a resol type phenolic resin, 10 to 30% by mass of a tetrafluoroethylene resin, and 25 to 35% by weight of a polyester fiber woven fabric. Laminated sliding member. The laminated sliding member according to any one of claims 1 to 6, wherein the solid lubricant layer contains a hydrocarbon wax, a tetrafluoroethylene resin, a melamine cyanurate, and a phosphate. The solid lubricant layer contains hydrocarbon wax 20 to 40% by mass, tetrafluoroethylene resin 20 to 50% by mass, melamine cyanurate 15 to 30% by mass and phosphate 5 to 15% by mass. The laminated sliding member as described. The laminated sliding member according to any one of claims 1 to 8, wherein the base has the other flat surface. The sliding member according to claim 9, wherein the other surface has a circular shape in plan view. The sliding member according to any one of claims 1 to 8, wherein the base body has the other convex spherical surface. The sliding member according to claim 11, wherein the other surface has a circular shape in plan view. A lower collar provided with a recess that opens on one surface, a rubber elastic body that is closely housed in the recess of the lower collar and that has an annular notch step on the outer periphery of the upper surface, and a notch step An annular ring that is fitted and fixed, an intermediate plate that is disposed on the upper surface of the rubber elastic body so as to be swingable and rotatable with respect to the lower collar, and has a concave portion on the upper surface, and is fitted and fixed to the concave portion of the intermediate plate A sliding bearing comprising the laminated sliding member according to claim 9 or 10, and an upper rod fixed with a sliding plate that slidably contacts the solid lubricant layer of the laminated sliding member. The sliding bearing according to claim 13, wherein the recess of the lower collar, the rubber elastic body, and the intermediate plate have a circular shape in a plan view. The annular ring is a protective ring made of synthetic resin fitted to the annular notch step portion of the rubber elastic body, and is arranged on the upper surface of the protective ring and is fitted to the annular notch step portion of the rubber elastic body. 15. A sliding bearing according to claim 13 or 14, comprising a combined metal compression ring. 13. A laminated sliding member according to claim 11 or 12, which is disposed on the lower eyelid having a concave spherical surface on one surface, and the other surface of the convex spherical surface in contact with the concave spherical surface of the lower eyelid. And a sliding support comprising a top plate to which a sliding plate that is slidably in contact with the solid lubricant layer of the laminated sliding member is fixed.

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